2013-05-06 Sandra Loosemore <sandra@codesourcery.com>
Andrew Jenner <andrew@codesourcery.com> gdb/gdbserver/ * Makefile.in (SFILES): Add linux-nios2-low.c. (clean): Add action to delete nios2-linux.c. (nios2-linux.c): New rule. * configure.srv: Add nios2*-*-linux*. * linux-nios2-low.c: New.
This commit is contained in:
Sandra Loosemore
parent
a1217d97c4
commit
68f5f83833
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@ -1,3 +1,12 @@
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2013-05-06 Sandra Loosemore <sandra@codesourcery.com>
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Andrew Jenner <andrew@codesourcery.com>
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* Makefile.in (SFILES): Add linux-nios2-low.c.
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(clean): Add action to delete nios2-linux.c.
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(nios2-linux.c): New rule.
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* configure.srv: Add nios2*-*-linux*.
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* linux-nios2-low.c: New.
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2013-05-03 Hafiz Abid Qadeer <abidh@codesourcery.com>
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* tracepoint.c (cmd_qtinit): Call 'stop_tracing'.
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@ -143,6 +143,7 @@ SFILES= $(srcdir)/gdbreplay.c $(srcdir)/inferiors.c $(srcdir)/dll.c \
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$(srcdir)/linux-ia64-low.c $(srcdir)/linux-low.c \
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$(srcdir)/linux-m32r-low.c \
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$(srcdir)/linux-m68k-low.c $(srcdir)/linux-mips-low.c \
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$(srcdir)/linux-nios2-low.c \
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$(srcdir)/linux-ppc-low.c \
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$(srcdir)/linux-s390-low.c \
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$(srcdir)/linux-sh-low.c $(srcdir)/linux-sparc-low.c \
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@ -323,6 +324,7 @@ clean:
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rm -f arm-with-iwmmxt.c
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rm -f arm-with-vfpv2.c arm-with-vfpv3.c arm-with-neon.c
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rm -f mips-linux.c mips64-linux.c
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rm -f nios2-linux.c
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rm -f powerpc-32.c powerpc-32l.c powerpc-64l.c powerpc-e500l.c
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rm -f powerpc-altivec32l.c powerpc-cell32l.c powerpc-vsx32l.c
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rm -f powerpc-altivec64l.c powerpc-cell64l.c powerpc-vsx64l.c
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@ -613,6 +615,8 @@ mips64-linux.c : $(srcdir)/../regformats/mips64-linux.dat $(regdat_sh)
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$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips64-linux.dat mips64-linux.c
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mips64-dsp-linux.c : $(srcdir)/../regformats/mips64-dsp-linux.dat $(regdat_sh)
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$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips64-dsp-linux.dat mips64-dsp-linux.c
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nios2-linux.c : $(srcdir)/../regformats/nios2-linux.dat $(regdat_sh)
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$(SHELL) $(regdat_sh) $(srcdir)/../regformats/nios2-linux.dat nios2-linux.c
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powerpc-32.c : $(srcdir)/../regformats/rs6000/powerpc-32.dat $(regdat_sh)
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$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-32.dat powerpc-32.c
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powerpc-32l.c : $(srcdir)/../regformats/rs6000/powerpc-32l.dat $(regdat_sh)
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@ -201,6 +201,15 @@ case "${target}" in
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srv_linux_usrregs=yes
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srv_linux_thread_db=yes
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;;
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nios2*-*-linux*) srv_regobj="nios2-linux.o"
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srv_tgtobj="linux-low.o linux-osdata.o linux-nios2-low.o linux-procfs.o"
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srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
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srv_xmlfiles="nios2-linux.xml"
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srv_xmlfiles="${srv_xmlfiles} nios2-cpu.xml"
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srv_linux_regsets=yes
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srv_linux_usrregs=yes
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srv_linux_thread_db=yes
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;;
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powerpc*-*-linux*) srv_regobj="powerpc-32l.o"
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srv_regobj="${srv_regobj} powerpc-altivec32l.o"
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srv_regobj="${srv_regobj} powerpc-cell32l.o"
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@ -0,0 +1,234 @@
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/* GNU/Linux/Nios II specific low level interface, for the remote server for
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GDB.
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Copyright (C) 2008-2013 Free Software Foundation, Inc.
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Contributed by Mentor Graphics, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "linux-low.h"
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#include <sys/ptrace.h>
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#include <endian.h>
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#include "gdb_proc_service.h"
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#include <asm/ptrace.h>
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#ifndef PTRACE_GET_THREAD_AREA
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#define PTRACE_GET_THREAD_AREA 25
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#endif
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/* The following definition must agree with the number of registers
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defined in "struct user_regs" in GLIBC
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(ports/sysdeps/unix/sysv/linux/nios2/sys/user.h), and also with
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NIOS2_NUM_REGS in GDB proper. */
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#define nios2_num_regs 49
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/* Defined in auto-generated file nios2-linux.c. */
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void init_registers_nios2_linux (void);
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/* This union is used to convert between int and byte buffer
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representations of register contents. */
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union nios2_register
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{
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unsigned char buf[4];
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int reg32;
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};
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/* Return the ptrace ``address'' of register REGNO. */
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static int nios2_regmap[] = {
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-1, 1, 2, 3, 4, 5, 6, 7,
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8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23,
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24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48,
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0
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};
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/* Implement the arch_setup linux_target_ops method. */
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static void
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nios2_arch_setup (void)
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{
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init_registers_nios2_linux ();
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}
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/* Implement the cannot_fetch_register linux_target_ops method. */
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static int
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nios2_cannot_fetch_register (int regno)
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{
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if (nios2_regmap[regno] == -1)
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return 1;
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return 0;
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}
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/* Implement the cannot_store_register linux_target_ops method. */
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static int
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nios2_cannot_store_register (int regno)
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{
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if (nios2_regmap[regno] == -1)
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return 1;
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return 0;
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}
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/* Implement the get_pc linux_target_ops method. */
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static CORE_ADDR
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nios2_get_pc (struct regcache *regcache)
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{
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union nios2_register pc;
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collect_register_by_name (regcache, "pc", pc.buf);
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return pc.reg32;
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}
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/* Implement the set_pc linux_target_ops method. */
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static void
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nios2_set_pc (struct regcache *regcache, CORE_ADDR pc)
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{
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union nios2_register newpc;
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newpc.reg32 = pc;
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supply_register_by_name (regcache, "pc", newpc.buf);
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}
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/* Breakpoint support. */
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static const unsigned int nios2_breakpoint = 0x003b6ffa;
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#define nios2_breakpoint_len 4
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/* Implement the breakpoint_reinsert_addr linux_target_ops method. */
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static CORE_ADDR
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nios2_reinsert_addr (void)
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{
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union nios2_register ra;
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struct regcache *regcache = get_thread_regcache (current_inferior, 1);
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collect_register_by_name (regcache, "ra", ra.buf);
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return ra.reg32;
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}
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/* Implement the breakpoint_at linux_target_ops method. */
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static int
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nios2_breakpoint_at (CORE_ADDR where)
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{
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unsigned int insn;
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(*the_target->read_memory) (where, (unsigned char *) &insn, 4);
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if (insn == nios2_breakpoint)
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return 1;
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return 0;
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}
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/* Fetch the thread-local storage pointer for libthread_db. */
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ps_err_e
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ps_get_thread_area (const struct ps_prochandle *ph,
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lwpid_t lwpid, int idx, void **base)
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{
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if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
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return PS_ERR;
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/* IDX is the bias from the thread pointer to the beginning of the
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thread descriptor. It has to be subtracted due to implementation
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quirks in libthread_db. */
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*base = (void *) ((char *) *base - idx);
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return PS_OK;
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}
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#ifdef HAVE_PTRACE_GETREGS
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/* Helper functions to collect/supply a single register REGNO. */
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static void
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nios2_collect_register (struct regcache *regcache, int regno,
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union nios2_register *reg)
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{
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union nios2_register tmp_reg;
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collect_register (regcache, regno, &tmp_reg.reg32);
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reg->reg32 = tmp_reg.reg32;
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}
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static void
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nios2_supply_register (struct regcache *regcache, int regno,
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const union nios2_register *reg)
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{
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supply_register (regcache, regno, reg->buf);
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}
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/* We have only a single register set on Nios II. */
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static void
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nios2_fill_gregset (struct regcache *regcache, void *buf)
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{
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union nios2_register *regset = buf;
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int i;
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for (i = 1; i < nios2_num_regs; i++)
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nios2_collect_register (regcache, i, regset + i);
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}
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static void
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nios2_store_gregset (struct regcache *regcache, const void *buf)
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{
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const union nios2_register *regset = buf;
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int i;
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for (i = 0; i < nios2_num_regs; i++)
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nios2_supply_register (regcache, i, regset + i);
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}
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#endif /* HAVE_PTRACE_GETREGS */
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struct regset_info target_regsets[] =
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{
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#ifdef HAVE_PTRACE_GETREGS
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{ PTRACE_GETREGS, PTRACE_SETREGS, 0, nios2_num_regs * 4, GENERAL_REGS,
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nios2_fill_gregset, nios2_store_gregset },
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#endif /* HAVE_PTRACE_GETREGS */
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{ 0, 0, 0, -1, -1, NULL, NULL }
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};
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struct linux_target_ops the_low_target =
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{
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nios2_arch_setup,
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nios2_num_regs,
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nios2_regmap,
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NULL,
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nios2_cannot_fetch_register,
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nios2_cannot_store_register,
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NULL,
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nios2_get_pc,
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nios2_set_pc,
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(const unsigned char *) &nios2_breakpoint,
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nios2_breakpoint_len,
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nios2_reinsert_addr,
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0,
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nios2_breakpoint_at,
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};
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